Unit Specs UI

[drowdemon]

The specs of a unit (attack, armor, range, LOS, speed, building attack, attackspeed) should be displayed somewhere. They should also be displayed when the unit is about to be trained, as info on what you will be doing.
There should also be an indication of how much this will be/is increased by current researches. So maybe a little +5 or whatever the number is.
Finish #9 first, as the HUD will change anyway after that is implemented.